Servicing in the FULL recovery model requires more log and disk space than a traditional upgrade using the SIMPLE recovery ...

Servicing in the FULL recovery model requires more log and disk space than a traditional upgrade using the SIMPLE recovery model. For further guidance around servicing collections in the FULL recovery model, visit http://go.microsoft.com/fwlink/?LinkId=280026. If you would prefer to attach using the SIMPLE recovery model, remove your collection database from the appropriate feature and then restart the Attach wizard. Once the attach operation is complete the feature may be re-enabled.